1. When the “s”block elements react, do they donate or accept electrons?

Answer : They donate electrons
2. Write the Subshellelectronic configuration of 24Cr ?

Answer : 1s2 2s2 2p6 3s2 3p6 3d5 4s1
3. Which subshell is common to all subshells?

Answer : s subshell
4.The atomic number of two elements are given below

Si-14,

Ni-28

a.Write the subshell electronic configuration of these elements.

b.Find out the group and peroid of each elements.
Answer :

a)  Si – 1s2 2s2 2p6 3s2 3p2

Ni – 1s2 2s2 2p6 3s2 3p6 3d8 4s2

b)   Si- period number-3,

Group number-14

Ni- period number-4,

Group number-10
5. The outermost electronic configuration of the element A is 2s2 2p3 [Symbol is not real], find the group number and block of the element? Answer : Group number-14,Block-P.
6. How many S subshell electrons are in 1s2 2s2 2p6 3s2 3p2

Answer : 6 Electrons.
7. Write down subshell electronic configuration of Cu1+ and Cu2+?

Answer : Cu1+ = 1s2 2s2 2p6 3s2 3p6 3d10

Cu2+ = 1s2 2s2 2p6 3s2 3p6 3d9
8. The elements having highest electro negativity is in the p block. Find its name and position ?

Answer : Fluorine, Period – 2, Block – p, Group- 17
9. Where is the position of d block elements in the periodic table ?

Answer : 3rd group to 12th group
10. Certain subshells of an atom are given below;

2s, 2d, 3f, 3d, 5s, 3p

Which are the subshells that are not possible?
Answer : 2d, 3f

—–Ebenezer HSS Veettoor—–